Swimming
It is called flanking.
It's actually called fish-tailing - because the side-to-side action mimics the movement of a fish's tail as it swims through the water.
the movement of the fish is because of its bones and/or spine.
To determine if your fish is sleeping or dead, observe its breathing and movement. If the fish is still breathing and shows some movement, it is likely sleeping. However, if there is no movement and the fish is not breathing, it may be dead.
a collection of fish is called a school of fish
the movement of fish is moving side to side up and down
Just a fish.
The lateral line is a sensory system found in aquatic vertebrates, such as fish, which helps them detect changes in water pressure and movement. It consists of a series of small sensory organs called neuromasts located along the sides of the fish's body. This system helps fish navigate, detect prey, and communicate with other fish.
A baby fish is called fry. A fish egg is called roe.
Newborn fish are called "fry".
The movement of a donkey is called trot!
It is called a Remora fish.